<p>numerous teachers tell me about the infamous school/teacher that for the final of philosophy class...on the board, the essay question was, "Why?"</p>
<p>those who put long answers that said "why not..." got C's but the only kid to get an A replied "because."</p>
<p>I'm pretty sure 10char is short for 10 characters.</p>
<p>Basically, it is a common filler when people have less than 10 characters to say, because to post a post you must have at least 10 characters in your reply.</p>